CARBIDE INTERNATIONAL CO., LTD.
SUB-MICRON TECH (HUIZHOU) CO., LTD.
TUNGSTEN CUTTING TOOL (NAN CHANG) CO., LTD.
TC TRADING CO.,LTD.
TCT ENTERPRISE LIMITED. BELI ENTERPRISE LIMITED.
TCT (KOREA) CO., LTD.
TCT (JAPAN) CO., LTD.
TCT CIRCUIT SUPPLY, INC.